In a block data editing apparatus according to the invention, block data to be stored in a block data storage area is mangaged by a block management table for storing block management data which includes reference position data representing a position on a page where the block data is to be displayed,...http://www.google.co.uk/patents/US4905185?utm_source=gb-gplus-sharePatent US4905185 - Apparatus for transferring block data in original form and editing the block data
